Keystones — Cornerstone
Five GCSE retrieval questions · 3 September 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 2⁄5 + 1⁄5
Answer: 3⁄5 -
2. Algebra Two-step equations
Solve: 2x - 11 = -1
Answer: x = 5 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 11cm and b = 14cm. Give your answer to 2 decimal places
Answer: 17.8cm -
4. Ratio Sharing in a ratio
Share 80 in the ratio 3:1
Answer: 60 and 20 -
5. Statistics Mean
Find the mean of: 7, 16, 20, 9, 8
Answer: 12